Rotatable cutting bit and bit washer therefor

Details Rotatable cutting bit and bit washer therefor Rotatable cutting bit and bit washer therefor

E - Fixed Constructions

21

C

E21C 35/197 (2006.01) E21C 35/18 (2006.01) F16B 43/00 (2006.01)

Patent

CA 2346458

A cutter tool comprises a tool holder (10), a cutting bit (12) mounted in a bore (14) of the tool holder, and a washer (40) disposed between the tool holder and the cutting bit. The washer is a conical (Belleville) washer which makes annular line contact with a shoulder (28) of the cutting bit, and with an edge (46) of the bore of the tool holder, in order to effectively seal-out fines from the bore.

Cet outil de coupe comporte un porte-outil (10), un taillant (12), installé dans l'alésage (14) du porte-outil, et une rondelle (40), placée entre le porte-outil et le taillant. Cette rondelle est une rondelle conique (Belleville) assurant un contact linéaire annulaire avec un épaulement (28) du taillant ainsi qu'avec un bord (46) de l'alésage du porte-outil et ce, afin d'interdire toute pénétration de fines dans l'alésage.

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